docs: def add(image_path, file_name=None):
      """Add an image to the GUI img library."""
      if file_name is not None:
          dst_path = os.path.join(IMG_DIR, str(Path(file_name).stem + Path(image_path).suffix))
      else:
          dst_path = IMG_DIR
  
      if os.path.isfile(image_path):
          shutil.copy2(image_path, dst_path)